diff --git a/docs/SourceLevelDebugging.html b/docs/SourceLevelDebugging.html
index de62063..23070d3 100644
--- a/docs/SourceLevelDebugging.html
+++ b/docs/SourceLevelDebugging.html
@@ -590,6 +590,7 @@
   DW_TAG_structure_type = 19
   DW_TAG_union_type = 23
   DW_TAG_vector_type = 259
+  DW_TAG_subroutine_type = 46
 </pre>
 
 <p>The vector flag indicates that an array type is a native packed vector.</p>
@@ -610,6 +611,10 @@
 or <a href="#format_composite_type">composite</a> type descriptors, each
 representing a field member of the structure or union.</p>
 
+<p>The the first member of subroutine (tag = <tt>DW_TAG_subroutine_type</tt>)
+types is the type of the return value for the subroutine.  The remaining
+elements are the formal arguments to the subroutine.</p>
+
 <p><a href="#format_composite_type">Composite type</a> location can be
 determined from the compile unit and line number.  The size, alignment and
 offset are expressed in bits and can be 64 bit values.  The alignment is used to